diff options
Diffstat (limited to 'arch/arm/mach-omap2/hsmmc.c')
| -rw-r--r-- | arch/arm/mach-omap2/hsmmc.c | 563 |
1 files changed, 352 insertions, 211 deletions
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c index 34272e4863f..07d4c7b3575 100644 --- a/arch/arm/mach-omap2/hsmmc.c +++ b/arch/arm/mach-omap2/hsmmc.c @@ -13,10 +13,15 @@ #include <linux/slab.h> #include <linux/string.h> #include <linux/delay.h> -#include <mach/hardware.h> -#include <plat/mmc.h> -#include <plat/omap-pm.h> +#include <linux/gpio.h> +#include <linux/platform_data/gpio-omap.h> +#include "soc.h" +#include "omap_device.h" +#include "omap-pm.h" + +#include "mux.h" +#include "mmc.h" #include "hsmmc.h" #include "control.h" @@ -24,14 +29,9 @@ static u16 control_pbias_offset; static u16 control_devconf1_offset; -static u16 control_mmc1; #define HSMMC_NAME_LEN 9 -static struct hsmmc_controller { - char name[HSMMC_NAME_LEN + 1]; -} hsmmc[OMAP34XX_NR_MMC]; - #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) static int hsmmc_get_context_loss(struct device *dev) @@ -120,65 +120,19 @@ static void omap_hsmmc1_after_set_reg(struct device *dev, int slot, } } -static void omap4_hsmmc1_before_set_reg(struct device *dev, int slot, - int power_on, int vdd) -{ - u32 reg; - - /* - * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the - * card with Vcc regulator (from twl4030 or whatever). OMAP has both - * 1.8V and 3.0V modes, controlled by the PBIAS register. - * - * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which - * is most naturally TWL VSIM; those pins also use PBIAS. - * - * FIXME handle VMMC1A as needed ... - */ - reg = omap4_ctrl_pad_readl(control_pbias_offset); - reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK | - OMAP4_MMC1_PWRDNZ_MASK | - OMAP4_USBC1_ICUSB_PWRDNZ_MASK); - omap4_ctrl_pad_writel(reg, control_pbias_offset); -} - -static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot, - int power_on, int vdd) +static void hsmmc2_select_input_clk_src(struct omap_mmc_platform_data *mmc) { u32 reg; - if (power_on) { - reg = omap4_ctrl_pad_readl(control_pbias_offset); - reg |= OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK; - if ((1 << vdd) <= MMC_VDD_165_195) - reg &= ~OMAP4_MMC1_PBIASLITE_VMODE_MASK; - else - reg |= OMAP4_MMC1_PBIASLITE_VMODE_MASK; - reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK | - OMAP4_MMC1_PWRDNZ_MASK | - OMAP4_USBC1_ICUSB_PWRDNZ_MASK); - omap4_ctrl_pad_writel(reg, control_pbias_offset); - /* 4 microsec delay for comparator to generate an error*/ - udelay(4); - reg = omap4_ctrl_pad_readl(control_pbias_offset); - if (reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK) { - pr_err("Pbias Voltage is not same as LDO\n"); - /* Caution : On VMODE_ERROR Power Down MMC IO */ - reg &= ~(OMAP4_MMC1_PWRDNZ_MASK | - OMAP4_USBC1_ICUSB_PWRDNZ_MASK); - omap4_ctrl_pad_writel(reg, control_pbias_offset); - } - } else { - reg = omap4_ctrl_pad_readl(control_pbias_offset); - reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK | - OMAP4_MMC1_PWRDNZ_MASK | - OMAP4_MMC1_PBIASLITE_VMODE_MASK | - OMAP4_USBC1_ICUSB_PWRDNZ_MASK); - omap4_ctrl_pad_writel(reg, control_pbias_offset); - } + reg = omap_ctrl_readl(control_devconf1_offset); + if (mmc->slots[0].internal_clock) + reg |= OMAP2_MMCSDIO2ADPCLKISEL; + else + reg &= ~OMAP2_MMCSDIO2ADPCLKISEL; + omap_ctrl_writel(reg, control_devconf1_offset); } -static void hsmmc23_before_set_reg(struct device *dev, int slot, +static void hsmmc2_before_set_reg(struct device *dev, int slot, int power_on, int vdd) { struct omap_mmc_platform_data *mmc = dev->platform_data; @@ -186,16 +140,19 @@ static void hsmmc23_before_set_reg(struct device *dev, int slot, if (mmc->slots[0].remux) mmc->slots[0].remux(dev, slot, power_on); - if (power_on) { - /* Only MMC2 supports a CLKIN */ - if (mmc->slots[0].internal_clock) { - u32 reg; + if (power_on) + hsmmc2_select_input_clk_src(mmc); +} - reg = omap_ctrl_readl(control_devconf1_offset); - reg |= OMAP2_MMCSDIO2ADPCLKISEL; - omap_ctrl_writel(reg, control_devconf1_offset); - } - } +static int am35x_hsmmc2_set_power(struct device *dev, int slot, + int power_on, int vdd) +{ + struct omap_mmc_platform_data *mmc = dev->platform_data; + + if (power_on) + hsmmc2_select_input_clk_src(mmc); + + return 0; } static int nop_mmc_set_power(struct device *dev, int slot, int power_on, @@ -204,174 +161,358 @@ static int nop_mmc_set_power(struct device *dev, int slot, int power_on, return 0; } -static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata; +static inline void omap_hsmmc_mux(struct omap_mmc_platform_data *mmc_controller, + int controller_nr) +{ + if (gpio_is_valid(mmc_controller->slots[0].switch_pin) && + (mmc_controller->slots[0].switch_pin < OMAP_MAX_GPIO_LINES)) + omap_mux_init_gpio(mmc_controller->slots[0].switch_pin, + OMAP_PIN_INPUT_PULLUP); + if (gpio_is_valid(mmc_controller->slots[0].gpio_wp) && + (mmc_controller->slots[0].gpio_wp < OMAP_MAX_GPIO_LINES)) + omap_mux_init_gpio(mmc_controller->slots[0].gpio_wp, + OMAP_PIN_INPUT_PULLUP); + if (cpu_is_omap34xx()) { + if (controller_nr == 0) { + omap_mux_init_signal("sdmmc1_clk", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc1_cmd", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc1_dat0", + OMAP_PIN_INPUT_PULLUP); + if (mmc_controller->slots[0].caps & + (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) { + omap_mux_init_signal("sdmmc1_dat1", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc1_dat2", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc1_dat3", + OMAP_PIN_INPUT_PULLUP); + } + if (mmc_controller->slots[0].caps & + MMC_CAP_8_BIT_DATA) { + omap_mux_init_signal("sdmmc1_dat4", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc1_dat5", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc1_dat6", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc1_dat7", + OMAP_PIN_INPUT_PULLUP); + } + } + if (controller_nr == 1) { + /* MMC2 */ + omap_mux_init_signal("sdmmc2_clk", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc2_cmd", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc2_dat0", + OMAP_PIN_INPUT_PULLUP); + + /* + * For 8 wire configurations, Lines DAT4, 5, 6 and 7 + * need to be muxed in the board-*.c files + */ + if (mmc_controller->slots[0].caps & + (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) { + omap_mux_init_signal("sdmmc2_dat1", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc2_dat2", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc2_dat3", + OMAP_PIN_INPUT_PULLUP); + } + if (mmc_controller->slots[0].caps & + MMC_CAP_8_BIT_DATA) { + omap_mux_init_signal("sdmmc2_dat4.sdmmc2_dat4", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc2_dat5.sdmmc2_dat5", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc2_dat6.sdmmc2_dat6", + OMAP_PIN_INPUT_PULLUP); + omap_mux_init_signal("sdmmc2_dat7.sdmmc2_dat7", + OMAP_PIN_INPUT_PULLUP); + } + } -void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers) + /* + * For MMC3 the pins need to be muxed in the board-*.c files + */ + } +} + +static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c, + struct omap_mmc_platform_data *mmc) { - struct omap2_hsmmc_info *c; - int nr_hsmmc = ARRAY_SIZE(hsmmc_data); - int i; - u32 reg; + char *hc_name; - if (!cpu_is_omap44xx()) { - if (cpu_is_omap2430()) { - control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE; - control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1; - } else { - control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE; - control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1; - } - } else { - control_pbias_offset = - OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_PBIASLITE; - control_mmc1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_MMC1; - reg = omap4_ctrl_pad_readl(control_mmc1); - reg |= (OMAP4_SDMMC1_PUSTRENGTH_GRP0_MASK | - OMAP4_SDMMC1_PUSTRENGTH_GRP1_MASK); - reg &= ~(OMAP4_SDMMC1_PUSTRENGTH_GRP2_MASK | - OMAP4_SDMMC1_PUSTRENGTH_GRP3_MASK); - reg |= (OMAP4_USBC1_DR0_SPEEDCTRL_MASK| - OMAP4_SDMMC1_DR1_SPEEDCTRL_MASK | - OMAP4_SDMMC1_DR2_SPEEDCTRL_MASK); - omap4_ctrl_pad_writel(reg, control_mmc1); + hc_name = kzalloc(sizeof(char) * (HSMMC_NAME_LEN + 1), GFP_KERNEL); + if (!hc_name) { + pr_err("Cannot allocate memory for controller slot name\n"); + kfree(hc_name); + return -ENOMEM; } - for (c = controllers; c->mmc; c++) { - struct hsmmc_controller *hc = hsmmc + c->mmc - 1; - struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1]; + if (c->name) + strncpy(hc_name, c->name, HSMMC_NAME_LEN); + else + snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i", + c->mmc, 1); + mmc->slots[0].name = hc_name; + mmc->nr_slots = 1; + mmc->slots[0].caps = c->caps; + mmc->slots[0].pm_caps = c->pm_caps; + mmc->slots[0].internal_clock = !c->ext_clock; + mmc->max_freq = c->max_freq; + mmc->reg_offset = 0; + mmc->get_context_loss_count = hsmmc_get_context_loss; - if (!c->mmc || c->mmc > nr_hsmmc) { - pr_debug("MMC%d: no such controller\n", c->mmc); - continue; - } - if (mmc) { - pr_debug("MMC%d: already configured\n", c->mmc); - continue; + mmc->slots[0].switch_pin = c->gpio_cd; + mmc->slots[0].gpio_wp = c->gpio_wp; + + mmc->slots[0].remux = c->remux; + mmc->slots[0].init_card = c->init_card; + + if (c->cover_only) + mmc->slots[0].cover = 1; + + if (c->nonremovable) + mmc->slots[0].nonremovable = 1; + + if (c->power_saving) + mmc->slots[0].power_saving = 1; + + if (c->no_off) + mmc->slots[0].no_off = 1; + + if (c->no_off_init) + mmc->slots[0].no_regulator_off_init = c->no_off_init; + + if (c->vcc_aux_disable_is_sleep) + mmc->slots[0].vcc_aux_disable_is_sleep = 1; + + /* + * NOTE: MMC slots should have a Vcc regulator set up. + * This may be from a TWL4030-family chip, another + * controllable regulator, or a fixed supply. + * + * temporary HACK: ocr_mask instead of fixed supply + */ + if (soc_is_am35xx()) + mmc->slots[0].ocr_mask = MMC_VDD_165_195 | + MMC_VDD_26_27 | + MMC_VDD_27_28 | + MMC_VDD_29_30 | + MMC_VDD_30_31 | + MMC_VDD_31_32; + else + mmc->slots[0].ocr_mask = c->ocr_mask; + + if (!soc_is_am35xx()) + mmc->slots[0].features |= HSMMC_HAS_PBIAS; + + switch (c->mmc) { + case 1: + if (mmc->slots[0].features & HSMMC_HAS_PBIAS) { + /* on-chip level shifting via PBIAS0/PBIAS1 */ + mmc->slots[0].before_set_reg = + omap_hsmmc1_before_set_reg; + mmc->slots[0].after_set_reg = + omap_hsmmc1_after_set_reg; } - mmc = kzalloc(sizeof(struct omap_mmc_platform_data), - GFP_KERNEL); - if (!mmc) { - pr_err("Cannot allocate memory for mmc device!\n"); - goto done; + if (soc_is_am35xx()) + mmc->slots[0].set_power = nop_mmc_set_power; + + /* OMAP3630 HSMMC1 supports only 4-bit */ + if (cpu_is_omap3630() && + (c->caps & MMC_CAP_8_BIT_DATA)) { + c->caps &= ~MMC_CAP_8_BIT_DATA; + c->caps |= MMC_CAP_4_BIT_DATA; + mmc->slots[0].caps = c->caps; + } + break; + case 2: + if (soc_is_am35xx()) + mmc->slots[0].set_power = am35x_hsmmc2_set_power; + + if (c->ext_clock) + c->transceiver = 1; + if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) { + c->caps &= ~MMC_CAP_8_BIT_DATA; + c->caps |= MMC_CAP_4_BIT_DATA; } + if (mmc->slots[0].features & HSMMC_HAS_PBIAS) { + /* off-chip level shifting, or none */ + mmc->slots[0].before_set_reg = hsmmc2_before_set_reg; + mmc->slots[0].after_set_reg = NULL; + } + break; + case 3: + case 4: + case 5: + mmc->slots[0].before_set_reg = NULL; + mmc->slots[0].after_set_reg = NULL; + break; + default: + pr_err("MMC%d configuration not supported!\n", c->mmc); + kfree(hc_name); + return -ENODEV; + } + return 0; +} - if (c->name) - strncpy(hc->name, c->name, HSMMC_NAME_LEN); - else - snprintf(hc->name, ARRAY_SIZE(hc->name), - "mmc%islot%i", c->mmc, 1); - mmc->slots[0].name = hc->name; - mmc->nr_slots = 1; - mmc->slots[0].caps = c->caps; - mmc->slots[0].internal_clock = !c->ext_clock; - mmc->dma_mask = 0xffffffff; - if (cpu_is_omap44xx()) - mmc->reg_offset = OMAP4_MMC_REG_OFFSET; - else - mmc->reg_offset = 0; +static int omap_hsmmc_done; + +void omap_hsmmc_late_init(struct omap2_hsmmc_info *c) +{ + struct platform_device *pdev; + struct omap_mmc_platform_data *mmc_pdata; + int res; - mmc->get_context_loss_count = hsmmc_get_context_loss; + if (omap_hsmmc_done != 1) + return; - mmc->slots[0].switch_pin = c->gpio_cd; - mmc->slots[0].gpio_wp = c->gpio_wp; + omap_hsmmc_done++; - mmc->slots[0].remux = c->remux; - mmc->slots[0].init_card = c->init_card; + for (; c->mmc; c++) { + if (!c->deferred) + continue; - if (c->cover_only) - mmc->slots[0].cover = 1; + pdev = c->pdev; + if (!pdev) + continue; - if (c->nonremovable) - mmc->slots[0].nonremovable = 1; + mmc_pdata = pdev->dev.platform_data; + if (!mmc_pdata) + continue; - if (c->power_saving) - mmc->slots[0].power_saving = 1; + mmc_pdata->slots[0].switch_pin = c->gpio_cd; + mmc_pdata->slots[0].gpio_wp = c->gpio_wp; + + res = omap_device_register(pdev); + if (res) + pr_err("Could not late init MMC %s\n", + c->name); + } +} + +#define MAX_OMAP_MMC_HWMOD_NAME_LEN 16 + +static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo, + int ctrl_nr) +{ + struct omap_hwmod *oh; + struct omap_hwmod *ohs[1]; + struct omap_device *od; + struct platform_device *pdev; + char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN]; + struct omap_mmc_platform_data *mmc_data; + struct omap_mmc_dev_attr *mmc_dev_attr; + char *name; + int res; + + mmc_data = kzalloc(sizeof(struct omap_mmc_platform_data), GFP_KERNEL); + if (!mmc_data) { + pr_err("Cannot allocate memory for mmc device!\n"); + return; + } - if (c->no_off) - mmc->slots[0].no_off = 1; + res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data); + if (res < 0) + goto free_mmc; - if (c->vcc_aux_disable_is_sleep) - mmc->slots[0].vcc_aux_disable_is_sleep = 1; + omap_hsmmc_mux(mmc_data, (ctrl_nr - 1)); - /* NOTE: MMC slots should have a Vcc regulator set up. - * This may be from a TWL4030-family chip, another - * controllable regulator, or a fixed supply. - * - * temporary HACK: ocr_mask instead of fixed supply + name = "omap_hsmmc"; + res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN, + "mmc%d", ctrl_nr); + WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN, + "String buffer overflow in MMC%d device setup\n", ctrl_nr); + + oh = omap_hwmod_lookup(oh_name); + if (!oh) { + pr_err("Could not look up %s\n", oh_name); + goto free_name; + } + ohs[0] = oh; + if (oh->dev_attr != NULL) { + mmc_dev_attr = oh->dev_attr; + mmc_data->controller_flags = mmc_dev_attr->flags; + /* + * erratum 2.1.1.128 doesn't apply if board has + * a transceiver is attached */ - mmc->slots[0].ocr_mask = c->ocr_mask; + if (hsmmcinfo->transceiver) + mmc_data->controller_flags &= + ~OMAP_HSMMC_BROKEN_MULTIBLOCK_READ; + } - if (cpu_is_omap3517() || cpu_is_omap3505()) - mmc->slots[0].set_power = nop_mmc_set_power; - else - mmc->slots[0].features |= HSMMC_HAS_PBIAS; - - if (cpu_is_omap44xx() && (omap_rev() > OMAP4430_REV_ES1_0)) - mmc->slots[0].features |= HSMMC_HAS_UPDATED_RESET; - - switch (c->mmc) { - case 1: - if (mmc->slots[0].features & HSMMC_HAS_PBIAS) { - /* on-chip level shifting via PBIAS0/PBIAS1 */ - if (cpu_is_omap44xx()) { - mmc->slots[0].before_set_reg = - omap4_hsmmc1_before_set_reg; - mmc->slots[0].after_set_reg = - omap4_hsmmc1_after_set_reg; - } else { - mmc->slots[0].before_set_reg = - omap_hsmmc1_before_set_reg; - mmc->slots[0].after_set_reg = - omap_hsmmc1_after_set_reg; - } - } + pdev = platform_device_alloc(name, ctrl_nr - 1); + if (!pdev) { + pr_err("Could not allocate pdev for %s\n", name); + goto free_name; + } + dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); - /* Omap3630 HSMMC1 supports only 4-bit */ - if (cpu_is_omap3630() && - (c->caps & MMC_CAP_8_BIT_DATA)) { - c->caps &= ~MMC_CAP_8_BIT_DATA; - c->caps |= MMC_CAP_4_BIT_DATA; - mmc->slots[0].caps = c->caps; - } - break; - case 2: - if (c->ext_clock) - c->transceiver = 1; - if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) { - c->caps &= ~MMC_CAP_8_BIT_DATA; - c->caps |= MMC_CAP_4_BIT_DATA; - } - /* FALLTHROUGH */ - case 3: - if (mmc->slots[0].features & HSMMC_HAS_PBIAS) { - /* off-chip level shifting, or none */ - mmc->slots[0].before_set_reg = hsmmc23_before_set_reg; - mmc->slots[0].after_set_reg = NULL; - } - break; - default: - pr_err("MMC%d configuration not supported!\n", c->mmc); - kfree(mmc); - continue; - } - hsmmc_data[c->mmc - 1] = mmc; + od = omap_device_alloc(pdev, ohs, 1); + if (IS_ERR(od)) { + pr_err("Could not allocate od for %s\n", name); + goto put_pdev; } - omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC); + res = platform_device_add_data(pdev, mmc_data, + sizeof(struct omap_mmc_platform_data)); + if (res) { + pr_err("Could not add pdata for %s\n", name); + goto put_pdev; + } - /* pass the device nodes back to board setup code */ - for (c = controllers; c->mmc; c++) { - struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1]; + hsmmcinfo->pdev = pdev; - if (!c->mmc || c->mmc > nr_hsmmc) - continue; - c->dev = mmc->dev; + if (hsmmcinfo->deferred) + goto free_mmc; + + res = omap_device_register(pdev); + if (res) { + pr_err("Could not register od for %s\n", name); + goto free_od; + } + + goto free_mmc; + +free_od: + omap_device_delete(od); + +put_pdev: + platform_device_put(pdev); + +free_name: + kfree(mmc_data->slots[0].name); + +free_mmc: + kfree(mmc_data); +} + +void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers) +{ + if (omap_hsmmc_done) + return; + + omap_hsmmc_done = 1; + + if (cpu_is_omap2430()) { + control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE; + control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1; + } else { + control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE; + control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1; } -done: - for (i = 0; i < nr_hsmmc; i++) - kfree(hsmmc_data[i]); + for (; controllers->mmc; controllers++) + omap_hsmmc_init_one(controllers, controllers->mmc); + } #endif |
